A Digitally Controlled Switching Regulator With Reduced Conductive EMI Spectra | IEEE Journals & Magazine | IEEE Xplore

A Digitally Controlled Switching Regulator With Reduced Conductive EMI Spectra


Abstract:

This paper presents the use of a combined random pulse position modulation (RPPM)/digital pulsewidth modulation (DPWM) digital controller for a buck converter to simultan...Show More

Abstract:

This paper presents the use of a combined random pulse position modulation (RPPM)/digital pulsewidth modulation (DPWM) digital controller for a buck converter to simultaneously achieve low-conductive electromagnetic interference (EMI) and a fast transient response. An area-efficient RPPM/DPWM controller suitable for advanced system-on-chip integration is proposed and implemented in a field-programmable gate array-based prototype to verify its EMI-suppression capability. The experimental results for a 1.2-V digital buck converter show that the proposed digital switching regulator can switch between RPPM and DPWM modes smoothly and automatically. Closed-loop system measurements demonstrate that, compared to DPWM, up to 17.27 and 14.99 dB power spectra reductions are obtained in the input current and switching node, respectively.
Published in: IEEE Transactions on Industrial Electronics ( Volume: 60, Issue: 9, September 2013)
Page(s): 3938 - 3947
Date of Publication: 10 July 2012

ISSN Information:


Contact IEEE to Subscribe

References

References is not available for this document.